Sewing-machine



(No Model.) 4 Sheets$heet 1.

J. B. PRICE. SEWING MAGHINB.

No. 527,288. I Patented Oct. 9, 1894.

No Model.) -4 Sheets-Sheet 2. A

- J. B. PRICE.

SEWING MACHINE.

No. 527,288. Patented Oct. 9, 1894.

a mmimnn mum Q lli iii

(No Model.) 4 sheets Sheet; 3. J. B. PRICE.

SEWING MACHINE.

No. 527,288. Patented'Oct. 9, 1894.

nonms warms co PNOY a. WASNINGTUN o c [No Model. 1 t 4 Sh1aets8heet 4.J. B. PRICE. SEWING MACHINE.

No. 527,288. Patented Oct. 9, 1894.

m: Mnnms PETERS co, PNGTOLITNQ. WASHINGYON. n. c.

UNITED STATES PATENT OFFICE.

JOHN 13. PRICE, OF WOLLASTON, MASSACHUSETTS, ASSIGN OR TO OSCAR ELSAS,OF ATLANTA, GEORGIA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,288, dated October9, 1894.

Application filed September 16, 1892. Serial No. 446,079. (No model.)

To all whom it may concern:

Be it known that I, J OHN B. PRICE, of Wollaston, county of Norfolk,State of Massachusetts, have invented an Improvement in Sewing-Machines,of which the following description, in .connection with the accompanyingdrawings, is a specification, like letters and on the drawingsrepresenting like parts.

This invention has for its object to simplify and improve that class ofsewing machines employed for uniting the ends of piece goods for dyeing,&c. p

In my improved machine, the eye-pointed needle above the cloth, and thecomplemental stitch-forming mechanism below the cloth derive theirstep-by-step or feeding movement across the cloth by or from'flexibledrivers preferably in the form of sprocket chains connected to theindependent carriages, in one of which carriages theneedle bar, and inthe other of which the complemental stitchforming mechanism works, bothsaid flexible drivers deriving their movement from a com: mon actuatoror shaft. Preferably the actuating mechanism for the flexible driverswill be so constructed as to enable the carriages referred to to bequickly drawn back into their normal or starting position after thecompletion of each seam. The seam which I prefer to make is of the classknown as a 1ap-seam, and to insure parallelism of the edges of theoverlapped cloth to be stitched, Ihave devised and combined with thework-support of the machine a novel. cloth'cutting device operating toout the cloth transversely while clamped and before the stitching of theseam has been started. This cloth cutting device comprises ablade, andan arm having a foot and connected to acutter-head, thelatter beingprovided with an operating rod. The blade works in a longitudinal groovein a bar 10- cated along one edge of the work support and constituting apart of theclamping mechanism and a clamping bar havinga longitudinalslot to guide the cutter-head, co-opcrates with said grooved bar toclamp together two edges of the material to be stitched,

all as Iwill proceed now more particularly to set forth and claim.

I By arranging the cloth cuttingmechanism or device .at one edge of thework support and parallel to the line of stitching to be made, it ispossible to put one broad piece of cloth in position on the bed-platewith its selvage edges substantially at right angles to the line of theseam to be made, and then to put the free end of that piece of clothinto the clamp together with the end of the other piece of cloth to bestitched to it, the other piece of cloth lying over the clamping bar.When the two ends are in the position described, they may be-cut oifwhile the ends of the cloth are in contact, thus leaving two straightand parallel edges, so that when the clamp is again opened, the operatormerely takes the end of the piece of cloth hanging in the two piecesuniformly'in the line of operation of the stitch-forming mechanism.

Figure 1, in front elevation partially broken away centrally to shorten.the same, shows a sewing machine embodying my present invention. Fig. 2is a partial vertical section en larged looking to the right of the linem, Fig. 1. Fig. 3 isa sectional detail showing the gearingfor rotatingthe needle-bar actuatingshaft. Fig. 4-. is a detail of the clutch to rotate the actuating shaft intermittingly; Fig.

5, a detail showing one of the two like sprocket 1 wheels about whichrun the flexible drivers at the left-hand end of the machine, viewingFig.1; Fig. 6, a detail of the needle-bar-carriage, to show the end ofthe flexible driver connected to it; Fig. 7, a detail of thecomplemental stitch-forming device shown on a smaller scale in Fig. 1, saidfigure showing but partof the carriage with the plate attached to itcarrying the loop detainer; Fig. 8, a moditied form of complementalstitch-'forming'device; Fig. 9, a detailof the cloth cutting do vicedetached; Fig. 10, anunder side view of 7 the loop detainerenlargedtogether with the bar; Fig. 11, atop view of the hook andloop'guard; Fig. 12, a detail of the stop lever and arm '1 Fig. 1 3, showsthe roll-controller detached. Fig 14:, shows part of the hub f insection with its spring pin. Fig. 15, shows the two pieces of clothlapped one on the other to be stitched; Fig. 16 to 18, details of theclamp.

Fig. 19, is a detail showing part of the car being set upon suitablelegs or stands A This frame-work is of peculiar shape, as will bedescribed, and has guide-ways A A see- Fig. 2, to receive respectivelythe sliding carriages 0,, b, the former carrying the needle-bar a, andthe latter, the complemental stitch- 2 5 will be adjustably secured tothe carriages by screws, as b 6 best shown in Figs. 1 and 8,

the contacting faces of the gibs and carriages being made wedge shapedor beveled as in Fig. 8, so that by turning the screws b in onehereinafter described and after opening the frame-work has suitablebearings for a main or power shaft B, provided with a suitable fast andloose pulley B, B and for suitably 1 rotated shafts B B The main shafthas fast upon it a gear 13 which engages respectively the gears B and 13fast respectively on the shafts B and B", the latter shafts beingrotated from the .gear Bi the shaft'B see Fig. 1, having, however,attached to it by a suitable set screw 07 a collar w said collar saidshaft during the reciprocation of the carriage b. The shaft B has a likecollar @0 to i prevent it from sliding longitudinally.

The shaft 13 is grooved longitudinally, as

at a to receive a spline a", see Fig. 3, connected, to a toothed gear asurrounding said part of the carriage a, so that as thesaid carriage ismoved longitudinally, as will be described, the said geara. is slid uponthe shaft The gear 1 a? meshes with and rotates a gear a4, fast,

B1 and is rotated in unison with it.

upon a. .needle-bar-actnating shaft a, said riage a, and having at itsfront end suitable or usual cams, links, or devices, to reeipro- 1 catevertically a needle-bar a, having atits 1' forming mechanism to bedescribed which 00- operates with the needle to form a stitch. Thesecarriages a and b'will in practice have at one edge a'gib b of a shapeto fit the guidef ways referred to, and preferably these gibs or theother direction, as may be necessary, the gib may be adjustedlongitudinally with rela-- tion to the carriage with which itco-operates to take upany lost motion or wear between the carriages andthe grooves in the frame-work in which they slide in operation,withdrawal 1 of the gib after withdrawing the shaft as preventinglongitudinal, movement of the lower end. an eye-pointed needle or,provided with a thread or. acted upon by a suitable tension device a andtaken from a suitable spool a on a suitable stand a.

The carriage b has suitable bearings to surround the shaft B and betweenportions of the carriage, but feather-keyed to said shaft B, is a cam bwhich while it is rotated by the shaft B is free to slide longitudinallythereon, said cam receiving in its groove a suitable roller or otherstud 2 connected toa lever 12 pivoted at its lower end upon the saidcarriage. n W l The lever 19 actuates the stitch-forming mechanismcomplemental to and cooperating with the needle 01. to form a stitch.

The under stitch-forming mechanism or complemental stitch-formingmechanism may moving and co operating with it a loop-guard 0', alsofastenedto said lever, said guard having a projection to enter a slot inthe lever, the guard being soldered to one part of the lever. This hookenters the loop of needle thread when moved to the right viewing Figs. 1and '2', and holds said loop while the needle rises, the said hook beingsuitably shaped at its under side to carry the loop of needle threadentered by it to the left when the hook is moved in that direction toretire from the loop, the movement of the hook to the left,'viewingFigs. 1 and 7, aiding in spreadchain by the right and left hand nut 43enabling a carriage to be readily removed. The a ing the loop for theentrance into it of the needle at its next descent through the material.The guard c has a projection 0 which, as the free end of the hook cretires from the loop of needle thread, enters said loop and in. thefurther movement of the hook to the left carries the loose loop alongwith it and leaves the said loop at the front end of the loop detaineri, see Fig. 10, said 100p detainer being ICO a narrow plate located atone side of the needle hole 15 in the plate a portion, as t, of the saiddetainer crossing the said needlehole. The detainer shown in Fig. 10 isadapted for use in a machine having two needles carried by the sameneedle bar, one of the arms projecting forwardfrom the portion 25co'operating with the loop of needle thread taken from one. needle. Theneedle i descends close to the edge of 15 said edge shaft loosely, saidgear being embraced by a serving to arrest the new loop of needle threadas the hook in its movement to the right, ente-rsand spreads said loop.This loop .detainer also serves the purpose usually served by the throatplate, but herein said detainer is fixed to and so as to move with the;carriage b during the stitching operation, shaft. being mounted inbearings in the carsaid detainer traveling belov. the slot between thework supporting plates 9 and g senses In Fig.8, the carriage b hasattached to it by screws 6, a shuttle race-plate 6 adapted to receiveasuitable shuttle carrier 6 in which rests a shuttle a provided withthread, and the under stitch-forming mechanism, shown in Fig. 8, may bequickly substituted for the under stitch-forming mechanism shown in Figs1 and 7, as a single or a double thread stitch is desired, thatdepending upon the particular work to be done. To effect this change, Ifirst withdraw the screw w to loosen the eollarw on the shaft B, thentake out the screws 6, remove the screw forming the pivot for the leverb and draw the shaft 13 laterally out from the cam b such movement ofthe shaft permitting the saidcam to be removed from the carriage. Thisdone, I supply to the carriage a cam 201 and a lever 200 to be actuatedby it, and put the shaft back through the said cam and fasten thecollar. These two carriages a, b, are independent each of the other andeach slides upon its own guides or tracks, but to sew properly theseindependent carriages must be moved in unison across the cloth, theirmovement being greater or less according to the length of the stitch tobe made.

The carriage a, has connected to it in suitable manner the opposite endsof a flexible driver f, while the carriage b has in like mannerconnected to it the opposite ends of a flexible driverf, these drivers,for the best results, being preferably in the form of sprocket chainsderiving their movement from sprocket wheels f f respectively on anupright shaft f sustained in suitable bearings in the part A of theframe, said flexible drivers passing around like sprocket wheels f onlyone of which is shown in Fig. 5,. suitably mounted on suitable studssupported by the frame-work at or near, in this instance, the left-handend of the machine. In order that the step-by-step or feeding movementof these carriages may be measured to a nicety according to the lengthof stitch desired, I have provided a feed device to co-operate with theupright shaft f and this feed device is preferably of the variety knownas a friction clutch feed, which I will now describe. The shaft f hasfast upon it a suitable hub f shown best in Fig. 4 cut away at suitableintervals to form pockets f for the reception of suitable rolls or ballsf each preferably acted upon by a pusher f shown as a rod,

acted upon by a suitable spring f The pockets are of varying depth andthe hub f is surrounded by a ring f having an earf which is connectedoperatively with a slidebar f having a frame f inside of which rotatesthe cam f fast on the driving shaft B, the rotation of the said shaftand cam reciprocating the frame f 15 and rod f to cause the ring f to bemoved in one and then in the opposite direction, the movement of thesaid ring in thedirection of the arrowin Fig.

4, causing the said rolls f to be carried into the smaller portions ofthe pockets f", the

springs f keeping the said rolls in contact with the hub and the ring,so that the rolls forced into the pockets serve to grasp frictionallythe hub f and effect the rotation of the upright'shaft f 4 and itsattached sprocket wheels, the sprocket chains moving the carriagescarrying the st-itch-formin g mechanism.

By the employment of a friction clutch feed in connection with thesprocket wheel shaped to actuate the flexible drivers, I may effect justthe proper length of, feed and may accomplish much better work thanthough a screw were used to efiect the relative change of position ofthe stitch-forming mechanism and the work-supporting plates g, g.

'The machine has'been provided with a stop rod 7' jointed at one end toan arm r of a rock shaft r extended horizontally to the rear of theframe and provided, see Figs. 2 and 12, with a second crank arm rsecured thereto by a pin 7*, said arm being bifurcated at its outer endfor the reception of the lower end of the stop lever r pivoted theretoat'r, the upper end of said lever having an open notch, see Fig. 12, toembrace a feed-regulating de vice '1' shown as a screw turned into thebar f said screw being also passed loosely through the ear f, therotation of said screw to withdraw it increasing the distance betweenthe outer or free end of the bar f and the washer r on the said screw.The greater this distance the less the length of stitch, this being dueto the lost motion, for it will be obvious that the washer r, thefarther it is distant from the end of the bar f, the less distance itwill move the ring in thedireetion opposite the arrow in Fig. 4. Thestop lever during the stitching operation is moved with the bar f aspring r surrounding the said bar acting to keep the ear f against theupper end of said lever. The rod 7" has clamped upon it, see Figs. 1 and19, a collar r shown as split and as having a screw r by which totighten it in place on said rod. As the carriage b completes itsmovementin the direction of the length of the seam, or to the leftviewing Fig. 1, it strikes the said collar and moves the rod 0"longitudinally, causing it, acting on armr of. rock-shaft 0' to turnsaid rock-shaft and with it the slotted stop lever T the latter beingmoved laterally away from the rod f connected to the reciprocating frameJ said rod being passed through the ear f of the clutch ring f of theclutch feed. After the removal of the stop lever r away from the rod f,all further movement of the ring will be stopped, and consequently thefeeding movement of the carriages carrying the stitch forming mechanismwill be arrested. This withdrawal of the lever creates so much lost.motion as to suspend or stop the rotation of the shaft f andconsequently the feeding movement of the carriages a and b. A spring 36acts normally to throw the stop lever toward the feedregulating device.The seam having been completed, it is desired to draw the carriages aand 19 back quickly to their starting point. To do this I have provideda roll controller 8, see Figs. 2 and 13, said roll-controllerconsisting'of a ring-like plate surrounding thenpper squared or slabbedend of said shaft,

' this rotation of said shaft in its backward direction enabling thesprocket wheels thereon through the sprocket chains toquickl-y draw backthe carriages a and b without actuating the stitch-forming mechanism toform stitches. The hub f of theclutch has two spring supported pins 31,one only shown, see Fig. 14, and theunder side of the roll-controllerhas four conntersinks as 32,. see Fig. 13, made in pairs, and these twopinsenter one or theother' of the countersinks of each pair accordingtothe position in which the operator leaves: the-roll-controller.

The stop lever has at its-lower end a pos itioning screw 33, the innerside of the: head of the said screw being kept in contact with the arm rby a spring 34 when. the said stop lever is disengaged from thefeed-regulating device This screw and spring act to keep the stop leverin proper upright position, so that when the rod '1" is to be moved toefiect there-engagement of the stoplever with the feed regulating devicea the carriages having been returned into their normal positions, there-engagementmaybe effected accurately.

The cloth to be stitched together rests on the work supports g, g,parallel plates, with a space, see Fig. 2, between them for the needletomove in,the plate g being attached to abar 9 in practice connected ateach end to suitable ears of the frame-work by set.

screws 9 The outer face of the bar 9 is shown as provided with alongitudinal groove for the passage of a blade h, see Fig. 9, and an armit having a foot h said arm being connected to a cutter-head h attachedto a *rod h said cutter-head being guided in a slot h in a clamping barh having arms 72/ attached to-a rock-shaft h mountedin suitable bearingsin the frame, sai l rock-shaft having other arms h connected by links hwith :arms h of a second rock-shaft it having a handle-h, the turning ofwhich enables the clamp frame tobe moved toward or from the outer side.of the bar 9 as when theends of the cloth are to be. clamped to be cuttrans. versely by the knife, or to be opened to remove. the trimmedcloth. and overlap their ends t0. be stitched, as represented inthedetai-l Fig. 15, the ends previously trimmed straight, beingsubstantially parallel.

In the modification Fig.8, the-shuttle faceplate has a throat plate n.

The carriageahas a suitable presser-bar n and attached foot n The needlethread will and may in practice have co-operating with it any usualtension device or slack thread-controller or take-up.

The arm A at its left-hand end is shown as steadied by a strut n pivotedat n on a part of the frame-work below the arm A When the strut isturned down as in dotted lines Fig. 1,. the cloth with its ends stitchedtogether may be removed from the machine.

. In preparing the cloth for sewing, the end der thevarm A from the rearside of the machine, and laid down over the outer edge of the bar 9theclamp bar h being'then away from it.

The end of the other pieceof cloth will be led from the front ofthe-machineover the clamp bar h and the clamp closed on the two ends,the cutter-head being in place in thesloth with the knife h at the leftof the bar h viewing Fig. 1. The operator will grasp the rod h and drawthecutter-head to of one piece will be led intothe machine un- J fromthe rear, and both pieces are moved slightly to the rear to bring theparts to be stitched together, in correct position under I the needle.

It is preferred to hold the cloth. stretched in about the lineot' seamduring the stitching operation, and to effect this,.I haveprovided twoclamps 10,10, each composed of jaws acted upon by a suitable spring 37'to keep pins, at the ends of the jaws, inthe cloth,vthe said pinsentering suitable holesas 38, in the plates 9, g, as shown in the detailFig. 16.

The jaws referred to are jointed to blocks IEO 39 suitably grooved attheir sides toembrace the edges of and slide in the space betweentheplates g, g.

For connecting the chains to thecarriages,

I prefer, as shown in Fig. 6, to provide each carriage with adjustablescrew studs 40, one shown in Fig. 6, to which the end of the chain willbe secured by a screw or rivet 4-1 when the stud has been properlyadjusted. .To

enable the chains to bekeptta-utl prefer to provide each chain near themiddleof. its length with a right and left-hand threaded nut 43 toengage screw studs as 44, 45,join.ted to thechain sections. See Fig. 20.

This invention is not limited to the exact form of clutch device torotate the shaft f intermittently, as instead I might employ any otherusual or suitable devices to impart to the said shaft'a step-by-stepmovement.

The loop detainer t, the shape of which is best shown in Figs. 1, 7 and10, is attached to the under side of a short plate I? mounted upon earst 15 of a block i secured to the upper end of the carriage b, said earsbeing shown but partially in Fig. 7, the main body of the carriage andblock being broken away to save space on the drawings. The plate 25 isof a width to substantially fillthe space between the edges of theplates g, g and serve as a support for the under side of the material onwhich rests the presser-foot. The plate t is provided with a needlehole, but said needle hole is elongated, this being necessary owing tothe fact that the stitch-forming mechanism and said plate travel acrossthe goods, the loop detainer t in this my invention detaining the loopas required and letting the thread play in the long slot if in thethroat-plate, this plan obviating the needle puckering the goods when achain stitch is being made.

I desire it to be understood that the needlebar may carry one or moreneedles if desired, and the hook be duplicated so as to makesimultaneously one or more rows of stitches.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. In a sewing machine for sewing together the ends of pieces of cloth,it containing the following instrumentalities, viz:a stationaryWork-support, clamps connected therewith to engage two pieces ofmaterial near the selvage edges thereof, and hold the same in placewhile the ends of the material are be ing stitched together, twoparallel rotating shafts B B gearing to connect the same, a needle barhaving a needle, a carriage in which said needle bar is mounted, arotating shaftin said carriage and connected with and 1 adapted toreciprocate the needle bar, a second carriage located below thework-support, a device therein to engage the loop of needle thread inthe formation of a stitch, a cam carried by said carriage movabletherewith and adapted to be rotated by the shaft B independentguide-ways for said carriages, a flexible driver for each of saidcarriages, a driven shaft with which said drivers are connected,and fromwhich they derive motion, a main shaft, and adjustable connectionsbetween the said main shaft and driven shaft whereby the motion of suchdriven shaft may be varied to aifect the length of stitch, substantiallyas described.

2. In a sewing machine, a work support; clamps to hold in place on saidsupport the material, the ends of which are to be stitched together; acarriage provided with a needle bar; a needle therein a carriageprovided with stitch-forming mechanism complemental to the needle;guide-ways for said carriages; and two flexible drivers, one connectedwith each of said carriages, combined with a shaft havsaid drivers, anda friction clutch device applied directly to and adapted to rotate saidsprocket wheel shaft, substantially as described.

t 8. In a sewing machine, thecombination of a carriage adapted tosupportand move part of the stitch-forming mechanism, guid e-ways in which saidcarriage travels and means to take up wear between said carriage and itsgulde-ways consisting of a beveled portion of the carriage next adjacentone of such guideways and an adjustable gib interposed between the saidbeveled portion and the guide- ,way next adjacent thereto, substantiallyas described.

4. In a sewing machine, a work-support, a-

carriage provided with a needle-bar, a needle there1n,a needle-baractuating-shaft mounted in bearin gs in said carriage, a shaft 13groovedlongitudinally, a movable toothed gear splined to said shaft,connections between said carriage and gear whereby the latter moves withthe former, a toothed gear on the needle-baractuating-shaft in mesh withthe movable toothed gear, a carriage provided withstitchformingmechanism complemental to the needle, guide-ways for said carriages, andtwo flexible drivers, one connectedwith each of said carriages, combinedwith a shaft having sprocket wheels to engage and actuate said drivers,a clutch applied directly to said sprocket Wheel shaft, and means foractuating said clutch and thereby rotating said shaft, substantially asdescribed.

- t 5. In a sewing machine, a work-support, a

I carriage provided with a needle-bar, a needle therein, a needle-baractuating-shaft mounted in bearings in said carriage, a shaft B grooveding sprocket wheels to engage and actuate longitudinally, a movabletoothed gear splined to said shaft, connections between said carriageand gear whereby the latter moves with the former, a toothed gear on theneedle-bar actuating-shaft in mesh with the movable toothed gear, acarriage provided with stitchforming mechanism com plemental to theneedle, and including a lever mounted on said carriage, a cam to actuatesaid lever, a rotating shaft on which said cam is splined loosely andcapable of longitudinal movement, guideways for said carriages, and twoflexible drivers, one connected with each of said carriages, combinedwith a shaft having sprocket wheels to engage and actuate said drivers,and a clutch applied directly to said sprocket wheel shaft, and meansfor actuating said clutch and thereby rotating said shaft, substantiallyas described.

6. In a sewing machine, the following instrumentalities, viz:awork-support; clamps to hold in place on said support the material to bestitched; a carriage provided with a needle bar; a needle in said bar; acarriage provided with stitch-forming mechanism complemental to theneedle; guide-ways for said carriages; two flexible drivers, oneconnected with each of said carriages, an upright shaft, as f providedwith two sprocket;

wheels to impart motion to said flexible drivclutch, and a stop lever,combined with devices actuated by one of said carriages to effect therelease of said stop lever and thereby ar- 7 rest the movement of theclutch, substantially stitch-forming mechanisms, of the work-holdasdescribed.

.7. In a sewing machine, the stitch-forming mechanisms, and slidablecarriages upon which they are mounted, drivers for such carriages, theshaft f and means to connect the said shaft and drivers, the hub fonsaid shaft, a surrounding ring, a series of rolls between the ringandhub, a bar, as f, provided with a feed-regulating device, and devicesto reciprocate said bar, combined with a I a stop-lever normally inoperative position with relation to the said feed-regulating deviceduring the sliding operation of the car riage, and means for moving thestop lever out of operative connection with the feed regulatingdevice,substantial1y as described.

8. .The combination, in a sewing machine, of a work-support having alongitudinal space for the operation of the stitch-forming mechanism,cloth-cutting mechanism consisting essentially of a bar located alongone edge of a the work-support and parallel to the line of stitching,and provided with a groove for the passage of the cutting blade, aclamping bar adapted to cooperate with said grooved bar to clamptogether transversely the two ends 1 of two pieces of material to bestitched, and I having a slot to guide the cutter-head,;a cutiter-head,a blade thereon and a connected foot, the blade being adapted tocut thecloth' transversely while held in the clamp to thus insure uniformoverlapping of the material ,to be stitched preparatory to the stitchingoperation, substantially as described.

9. In a sewing machine, the combination with the upper and lowercomplementaling plates separated from one another in the plane ofmovement of the stitch-forming mechanisms and having holes along theirparallel edges, combined with the cloth clamping and stretching devicesconsisting of spring-jaws supported upon blocks movable in the spacebetween the plates and supported by such plates and having pins toengage the holes in such plates, substantially ,asdescribed.

10. In a sewingmachine, the stitch-forming mechanisms and slidablecarriages upon which they are mounted, drivers for such carriages andthe driving shaft'ffi'and its cooperating clutch actuating devices, saidde- 'vices including a feed regulating device made as a screw, combinedwith a stop-lever, an :arm onwhich it is pivoted, and a positioningscrew and spring, as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN B. PRICE.

Witnesses:

GEO. W. GREGORY, M. J. SHERIDAN.

